Shock-absorber.



ARTHUR n, ZUMWALT, or FULTON, chLIronnI.

*j i, assise.

Specification of Iietters Batentl 'Patented nay v15, 1917.

Application filed November 9, 1916. Serial No. 130,404.

To all zu 1.0m z't-may/ concern:

Be itknown that I, A BTHUR B. ZUMWALT, a citizen of the UnitedjliStates, residing at Fulton, in the county of Sonoma and State of California, have invented certain new uand useful Improvements in" Shock-Al sorbers; and I do declare the following to-be a full, clear, and exact description ofthe 1nvention, such as Willv enable others skilled in use the same. I p

This invention relates to new and useful the art to which it app'ertains /to make and 'improvements vin shockabsorbers and the primary object of the invention is to provide vide a device x ily and simply constructed, inexpensive to a device of this character which may be attached to a vehicle, preferably to any ordi.- nary automobile, and which will absorb the shocks and vibrations and cushion the connection between the spring and iframe of the vehicle. y y

Another object of the invention isI to proof this character Whiclr is easlnanufacture, and one which will be very ehcient in operation. i

With these and numerous other Yobjects in view, my invention arrangement of parts which Will. be hereinafter referred to and!A more particularly pointed out in the specification and claim.

- In the accompanying drawings:

Figure 4lfis a side elevation showing` the shockl absorber applied the spring of a vehicle;

Fi 2 is a Vertical section of the shock absor r;

Fig. 3 is a vertical section on the line 3-3 of Fig. 2;

rear end of a vehicle,

Fig. l is a horizontal section on the line es. of rig. 2.

In describing my invention I shall refer to the drawing in which similar reference characters designate corresponding parts throughout the several views. In Fig. 1 I have shown my shoclg absorber applied to the the numeral 1 designating the frame and the numeral 2 the supporting spring which is secured to the axle- 3. Thiss'u'pporting spring 2 is connected at one end 4 With the rear end of the frame, While the free end of the same which is designated by the numeral 5 is connected with `i the shock absorber.

The shock absorber which is designated by the numeral 6 comprises a housing .which consists ofv the novel features of construction', combination and to the rear end of" forms a shackle that connects the free end :iy

of the spring with vthe frame 1. This housing is formed Withtwo parallel. side men1- bers 7 and 8 which have their upper ends extending a short distance upwardlyjalong the opposite sides of the frame 1, andv are pivotally in Fig. 3 of the drawing.

connected by a #front front plate 10 when in short distance lbenen/th thei bottom of the frame 1 for a purpose todae hereinafter more fully described. rlfhe rear edges of the sides 7 and 8 are connected by a back strip 11'.

which has its upper edge disposed .in va single plane with the upper edge of the front.

plate and which extends across the rear edges of the sides of the housing adjacent the top of the same, so that the rearside of said housing is left open. The sides 7 and 8 of the housing are provided with alining longitudinally extending 'slots 12 for a purpose to be hereinafter more fully described.

The free-end 5 of the supporting spring 2 is positioned Within the housing adjacent the bottom of the same thrcughits open side, and this end of the spring has projecting laterally therethrough a boltl 13 which is provided with projecting ends 14 which extend fromthe opposite sides of the spring and which are slidably positioned through the slots 12 in the sides of the housing. These projecting ends 14 ofthe bolts have Wear rings l5 thereon that engage the opposite move therealong.

Positioned Within the housing 6 is a paix`- of coiled springs 16 andl 17 positioned one Within the other which have their lower ends positioned on the free end 5 of the spring, While their upper ends are positioned against the bottom of the frame 1. Th

will hold the. free end of the supporting connected therewith by a poltfg' which extends therethrough as clearly thon/fn `i ico ese springs spring spaced from the bottom ofthe frame and will also take up all vibration and shocks as the free end of the spring is allowed to move upwardly in the housing against the tension of these springsyupon any severe shock, etc. y

In operation the housing forms a shackle which is positioned between the frame lia'nd ict the free end of thasuppgrting spring 2, and y A sod the coiled 'springs within this housing will forni the tensioning means-that absorb all shocks, vibratiol'is, etc., between the supporting spring and the axle. The projecting 4ends of the bolt at the4 end of the supporting spring slide freely Within the slots in the opposite sides of the housing and the brass wear rings on these projecting ends `will protect the same is obvious.

' rllhe longitudinal slots l2 in the side members of the housing are positioned, adjacent the bottom ot' the same and extend upwardly appro mnately a short distance less than halt" l when the housing is in position, so that'the i housing may .oseillate to accommodate itself to the movement of the leaf spring when the vehicle passes over an obstruction. V

From the foregoing description of the construction `and operation 'of my shock absorber, theinanner of applying the same to use and the operation thereof will be readily understood and it will be .seen ythat I have provided a simple and eiicient means for carrying out the objects of thisinvention. The housing 6, if desired, may be cast in one piece, or the various parts are made separately.

I claim:

The combination .with a leaf spring adapted" to be connected intermediate its ends to an axle, one end of said spring being connected with one end'of a vehicle frame, and a spring connection on the other end oi' the leaf spring adapted to be connected to the Y frame of a vehicle, said spring connection comprising a casing pivotally connected to said' frame' and having one side and its top open, the opposite sides of the casing having lalined longitudinally extending slots l therein, the end of the 4leaf spring adapted toy be slidably )ositioned in said casing through its open sldc, an integral dependlngbearing on said syn-ing with its ends ahued with the slots inthe sides of the casing, a

bolt carried by said bearing with projecting Yends positioned through said slots and adapted to slide therein, wire .rings sur- .rounding said ends and adapted to engage the sides of the slots, and a pair of coiled springs disposed one within'the other in the ,asing and ha ving one end resting on the end of the leaf spring and the other against the bottom of the frame.

In testimony whereof I have hereunto set my h'and in the presence of t'wo subscribing1 witnesses. i f i ARTHUR B. ZUNIWAI'I. litnesses Ross CAMPBELL, Hmmm T. CnnNownTn. 

